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Power Systems

Power Systems
The value of diversity factor is

 less than 1
 0
 greater than 1
 1

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Power Systems
a 50 Hz, 3-phase synchronous generator has inductance per phase of 15 mH. The capacitance of the generator and circuit breaker is 0.002 µF. What is its natural frequency?

 29 kHz
 290 kHz
 29 MHz
 2.9 kHz

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Power Systems
The commercial sources of energy are

 solar, wind, biomass.
 wood, animal wastes and agricultural wastes.
 none of above.
  fossile fuels and radioactive substances.

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Power Systems
The characteristic impedance of a transmission on line is

 Directly proportional to its length.
 Inversely proportional to its length.
 Directly proportional to square root of its length.
  Independent of its length.

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Power Systems
Based on the discharge, Kaplan turbine will discharge

 >10000 lpm
 1000 lpm

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Power Systems
In thermal power plants the size of coal after crushing

 200 - 205 mm.
 40 mm.
  300 mm.
  20 - 25 mm.

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